检索结果-南通市图书馆

Precipitation evolution and properties of Cu-15Ni-8Sn alloys via Al microalloying during ageing

Rare Metals 2024年第10期43卷 5216-5228页

作者： Wei Luo Li-jun Peng xu-jun mi Hao-Feng Xie Yi-Cheng Cao Shu-Hui Huang State Key Laboratory of Nonferrous Metals and Processes GRINM Group Co.Ltd.Beijing 100088China GRIMAT Engineering Institute Co. Ltd.Beijing 101407China General Research Institute for Nonferrous Metals Beijing 100088China School of Materials Science and Engineering South China University of TechnologyGuangzhou 510640China

Studies have shown that microalloying Cu-Ni-Sn alloys using Al inhibits discontinuous precipitation reactions;however,the mechanism has not been investigated ***,this study explored the properties and precipitation evolution of Cu-15Ni-8Sn alloys without and with 1 wt%Al(Cu-15Ni-8Sn-1Al)during ageing at 500℃ through X-ray diffraction(XRD),scanning electron microscopy and high-angle annular dark-field scanning transmission electron *** results revealed that in Cu-15Ni-8Sn alloy,DO_(22)ordering first occurred after spinodal decomposition,subsequently transitioning to an L1_(2)ordering phase,during which the discontinuous precipitates gradually nucleated at the grain boundaries and formed *** alloy hardness increased sharply with ordering and then decreased rapidly after reaching its peak value,due to the dominance of the discontinuous precipitation ***,the DO_(22)ordered phase did not appear during the ageing of Cu-15Ni-8Sn-1Al alloy,and a Ni_(3)(Al_(x),Sn_(1-x))intermetallic compound with L1_(2)structure was formed,consuming Ni and Sn atoms,thereby significantly suppressing the discontinuous precipitation reaction and improving the stability during prolonged *** tensile strength(yield strength)of Cu-15Ni-8Sn and Cu-15Ni-8Sn-1Al alloys at peak hardness were 855(755)and 936 MPa(892 MPa),respectively,and their main strengthening mechanisms were solid solution strengthening and precipitation *** addition of 1 wt%Al effectively improved the precipitation strengthening effect of Cu-Ni-Sn alloys but severely decreased the ductility.

关键词： Cu-15Ni-8Sn Al addition Precipitation sequence Strengthening mechanism

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

microstructure of phases in a Cu–Zr alloy

引用

Rare Metals 2015年第10期34卷 706-709页

作者： Li-jun Peng xu-jun mi Bai-Qing Xiong Hao-Feng Xie Guo-Jie Huang State Key Laboratory of Nonferrous Metals and Processes General Research Institute for Nonferrous Metals

The morphology and crystallography of phases in the Cu-0.12% Zr alloy were investigated by scanning electron microscope(SEM), transmission electron microscope(TEM), and high-resolution transmission electron microscope(HRTEM). The results show that the as-cast microstructure of Cu–Zr alloy is mainly Cu matrix and eutectic structure which consist of Cu and Cu5Zr phases with a fine lamellar structure. The disk-shaped and plateliked Cu5Zr phases with fcc structure are found in the matrix, in which habit plane is parallel to {111}a plane of the *** the copper matrix and Cu5Zr phase,there exists an orientation relationship of [112]a|| [011]Cu5Zr;(111)a||(111)Cu5Zr. The space structure model of Cu5Zr phase can be established.

关键词： Cu–Zr alloy microstructure Crystal structure Morph

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

microstructural evolution and properties of a Cu-Cr-Ag alloy during continuous manufacturing process

引用

Rare Metals 2021年第8期40卷 2213-2220页

作者： Gao-Lei xu Li-jun Peng Guo-Jie Huang Hao-Feng Xie Zhen Yang xue Feng Xiang-Qian Yin xu-jun mi State Key Laboratory of Nonferrous Metals and Processes GRIMAT Engineering Institute Co.Ltd.Beijing101417China Zhejiang Libo Industrial Co. Ltd.Shaoxing312050China

microstructure evolution and properties of a Cu-Cr-Ag alloy during the continuous manufacturing process were investigated in detail by scanning electron microscopy(SEM)and transmission electron microscopy(TEM)in the *** Cu-Cr-Ag alloy rod with uniform compositions is fabricated by upward continuous casting *** of the Cr phases are observed in the ascast *** the continuous extrusion process,the severe shear deformation and the dynamic aging *** average grain size of as-extruded alloy is much smaller than that of as-cast *** fcc and bcc Cr precipitates appear in the *** interaction mode between dislocations and precipitates can be identified as Orowan bypass mode according to the TEM *** overall difference in the yield strength between as-cast and as-extruded Cu-Cr-Ag alloy is attributed to solid solution strengthening,grain refinement strengthening,precipitation hardening and working hardening.

关键词： Cu-Cr-Ag alloy Upward continuous casting Continuous extrusion microstructure Physical properties

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

High-temperature deformation behaviors of Ti-2Al-9.2Mo-2Fe alloy with boron

引用

Rare Metals 2023年第5期42卷 1695-1705页

作者： Rong Chen Song-Xiao Hui Wen-jun Ye Yang Yu xu-jun mi Dong-Geun Lee Yong-Tai Lee State Key Laboratory for Nonferrous Metal and Processing General Research Institute for Nonferrous MetalsBeijing100088China Department of Materials Metallurgical Engineering Sunchon National UniversitySunchon57922Korea Department of Nano New Materials Kyungnam UniversityChangwon51767Korea

Hot deformation behaviors of Ti-2Al-9.2Mo-2Fe alloy with boron were investigated in a hot compression test at temperatures ranging from 850 to 1000℃and strain rates ranging from 0.01 to 10.00 s^(-1).With strain rate decreasing and deformation temperature increasing,dynamic recrystallization(DRX)was promoted in both *** nucleation mechanism of DRX involved grain boundary bulging and subgrain *** case of deformation at low temperatures and high strain rates,the boronfree alloy only showed dynamic recovery(DRV)***,due to the particle-stimulated nucleation mechanism of recrystallization by TiB particles,the boron-containing alloy shows DRX at that *** DRX grain nuclei are formed by lattice rotation and subgrain growth from deformation zone in the initial grains,which are close to those of TiB ***,the flow stress of the boron-containing alloy is lower than that of the boron-free alloy due to the grain refinement during hot deformation process.

关键词： Newβtitanium alloy Boron addition Hot deformation Particle-stimulated nucleation Dynamic recrystallization

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Interface evolution of Cu-Ni-Si/Al-Mg-Si clad composite wires after annealing

引用

Rare Metals 2020年第12期39卷 1419-1424页

作者： Zhen Yang xu-jun mi xue Feng Hao-Feng Xie Li-jun Peng Guo-Jie Huang Yan-Feng Li Xiang-Qian Yin Key Laboratory of Nonferrous Metals and Processes GRIMAT Engineering Institute Co.LtdBeijing 101400China

Interface micros tructures of Cu-Ni-Si/Al-MgSi clad composite wires during isothermal annealing from 623 to 773 K were *** composite wires were fabricated by a drawing *** evolution of intermetallic compounds(IMCs)was analyzed.A continuous IMCs layer forms only after annealing for 1 min,which may be due to more IMCs nucleation points generated by deep drawing *** consist of Al_(4)Cu_(9),AlCu and Al_(2)Cu identified by energy-dispersive spectroscopy(EDS)and transmission electron microscopy(TEM).The growth activation energies of total IMCs,Al_(2)Cu,AlCu and Al_(4)Cu_(9),are 98.8,69.4,101.3 and 137.1 kJ·mol^(-1),*** higher growth activation energy of Al_(4)Cu_(9)results in the higher growth rate under high ***,the average interdiffusion coefficient for each IMC calculated by Wagner method shows that interdiffusion in Al_(2)Cu and AlCu is more active than that in Al_(4)Cu_(9).The higher growth rate of Al_(4)Cu_(9)may be caused by the long concentration range.

关键词： Intermetallic compounds Clad composite wires Diffusion Activation energy

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Improving interface adhesion in TiNi wire/shape memory epoxy composites using carbon nanotubes

引用

Rare Metals 2021年第4期40卷 934-938页

作者： xue Feng Li-min Zhao xu-jun mi Guo-Jie Huang Hao-Feng Xie Xiang-Qian Yin Li-jun Peng Zhen Yang State Key Laboratory of Nonferrous Metals and Process General Research Institute for Nonferrous MetalsBeijing 100088China College of Materials Science and Engineering Liaocheng UniversityLiaocheng 252059China

In order to increase both the interfacial strength and interphase region strength between TiNi wires and shape memory epoxy,a novel interface structure including aminated CNTs was *** morphology shows that after electroplating and etching,continuous and homogeneous concave-convex layers form on the surface of astreated TiNi wires,meanwhile aminated CNTs were planted on the surface which could react with shape memory epoxy at the interface *** interfacial shear strength increases first with the CNT content rising but then a dramatic drop happens,and the maximum is obtained at CNT content of 0.6 g·L^(-1),which is about twice the result of acid etching TiNi wires.

关键词： Interfacial strength Interface structure Carbon nanotube Shape memory material Composite

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Antibacterial property,corrosion and discoloration resistance of pure copper containing Zn or Ni

引用

Rare Metals 2022年第12期41卷 4041-4046页

作者： Yun Jiang Wen-Jing Zhang xu-jun mi Guo-Jie Huang Hao-Feng Xie xue Feng Li-jun Peng Zhen Yang State Key Laboratory of Nonferrous Metals and Processes GRINM Group Co.LtdBeijing 100088China GRIMAT Engineering Institute Co. LtdBeijing 101407China General Research Institute for Nonferrous Metals Beijing 100088China

This study focused on the effects of Zn and Ni addition on the antibacterial properties and corrosion resistance of copper *** antimicrobial properties of copper and copper alloys were evaluated using Escherichia coli... 详细信息

关键词： corrosion resistance alloys

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Kinetics of discontinuous precipitation in Cu–20Ni–20Mn alloy

引用

International Journal of minerals,Metallurgy and Materials 2016年第3期23卷 323-329页

作者： Wei-bin Xie Qiang-song Wang Guo-liang Xie xu-jun mi Dong-mei Liu xue-Cheng Gao State Key Laboratory for Fabrication and Processing of Non-ferrous Metals General Research Institute for Nonferrous Metals

The morphology and growth kinetics of discontinuous precipitation （DP） in a Cu-20Ni-20Mn alloy were investigated in the tem- perature range of523-573 K by optical microscopy, scanning electron microscopy, and transmission electron microscopy. A lamellar mixed structure consisting of alternating larnellae of a matrix and NiMn phase was observed in DP colonies. The volume fraction of regions formed by a DP reaction was determined by quantitative metallographic measurements. The kinetics of DP was evaluated on the basis of the John- son-MehI-Avrami Kohnogorov equation, which resulted in a time exponent of approximately 1.5. We confirmed that the nucleation of the discontinuous precipitate was confined to grain edges or boundaries at an early stage of the reaction. The activation energy of DP process was determined to be approximately （72.7 ± 7.2） kJ/mol based on the Arrhenius equation; this result suggests that DP is controlled by gn-ain boundary diffusion. The hardness values exhibited good correlation with the volume fraction of DP; this correlation was attributed to the plvsence of the ordered N iMn phase.

关键词： copper nickel manganese alloys: microstructural evolution precipitation kinetics

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Properties and microstructure of copper–titanium alloys with magnesium additions

引用

Rare Metals 2024年第5期43卷 2290-2299页

作者： Lue Huang Li-jun Peng Jiang Li xu-jun mi Gang Zhao Guo-Jie Huang Hao-Feng Xie Yi-Cheng Cao Wen-Jing Zhang Zhen Yang State Key Laboratory of Nonferrous Metals and Processes GRINM Group Co.Ltd.Beijing 100088China GRIMAT Engineering Institute Co. LtdBejing 101407China School of Materials Science and Engineering Northeastern UniversityShenyang110000China General Research Institute for Nonferrous Metals Beijing 100088China China Academy of Space Technology Beijing 100094China China Nonferrous Metals mining Group(Tianjin)Co.Ltd Tianjin 3001llChina

The volume fractions and morphology of precipitates in precipitation-strengthened Cu-Ti alloys,which precipitate mainly as continuous and discontinuous precipitates,are important for the application of the *** study employed hardness and electrical conductivity tests transmission electron microscopy(TEM),atom probe tomography(APT),and first-principles calculations to demonstrate that the addition of Mg is effective for accelerating nanosized continuousβ'-Cu_(4)Ti precipitation as well as for suppressing the precipitation of coarse lamellar discontinuousβ-Cu_(4)Ti precipitates along the grain boundaries,resulting in Cu-Ti alloys with high yield strength and good electrical *** results showed that the continuous precipitation ofβ'-Cu_(4)Ti was accelerated by the Mg additions,which reduced the supersaturation of the matrix,thereby reducing the chemical driving force for the discontinuous *** the other hand,Mg additions increased the mismatch between the discontinuousβ-Cu_(4)Ti precipitates and matrix decreased the nucleation rate of the discontinuous precipitates,and increased the spacing of the discontinuous precipitation layer,resulting in a lower growth rate of the discontinuous ***,the addition of Mg to Cu-Ti alloys enhances the strength and improves the resistance to over-ageing.

关键词： Cu-Ti-Mg alloy Precipitation hardening Discontinuous precipitation Continuous precipitation microstructure formation mechanism

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Unveiling thermal properties and pump-out blocking in diamond/GaInSn composites as thermal interface materials

引用

Rare Metals 2023年第12期42卷 3969-3976页

作者： Shi-Jie Du Hong Guo Zhong-Nan Xie Jie Zhang Shu-Hui Huang Nan Wu xu-jun mi Xin-Bo He Hui Yang Yu-Lin Liu State Key Laboratory of Nonferrous Metals and Processes China GRINM Group Co.LtdBeijing 100088China Institute for Advanced Materials and Technology University of Science and TechnologyBeijing 100083China GRIMAT Engineering Institute Co. LtdBeijing 101407China General Research Institute for Nonferrous Metals Beijing 100088China

Gallium-based liquid metal,as a high-performance thermal interface material,can improve the performance and service life of electronic *** study focuses on the use of diamond as a thermal conductivity enhancement phase to improve the thermal conductivity of GaInSn liquid metal and avoid the overflow of liquid metal during *** this study,diamond/GaInSn composites were prepared by an ultrasonic-assisted wetting *** thermal conductivity and contact thermal resistance of diamond/GaInSn composites were characterized by the transient *** morphology and thermal conductivity of diamond/GalnSn composites were investigated when diamond particles of different diameters were added to GaInSn liquid *** addition of large-sized diamond particles can effectively improve the thermal conductivity of thermal interface materials (TIMs) but willcause liquid metal to pump out.

关键词： composites thermal interface

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：